Rechargeable battery pack specifically for the Game Boy, convenient for charging from a household power source. - Brand: Nintendo - Model: DMG-03 - Type: Rechargeable Battery Pack - Charging Method: Rechargeable from a household power source - Compatible Models: Game Boy Thank you for viewing. The contents are clean, but the box has some stains due to aging, so please check the photos. Initial operation is unknown. Please refrain from purchasing if you are concerned about being a junk item, or if you are concerned about storage by a non-professional.